CVE-2026-22558 in UniFi Network Application
Summary
by MITRE • 03/19/2026
An Authenticated NoSQL Injection vulnerability found in UniFi Network Application could allow a malicious actor with authenticated access to the network to escalate privileges.
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Analysis
by VulDB Data Team • 03/24/2026
The vulnerability identified as CVE-2026-22558 represents a critical authenticated NoSQL injection flaw within the UniFi Network Application platform. This vulnerability specifically affects the authentication and authorization mechanisms of the UniFi system, which is widely deployed for enterprise network management and wireless infrastructure control. The UniFi Network Application serves as the central management interface for UniFi devices including access points, switches, and security appliances, making it a prime target for attackers seeking persistent access to corporate networks. The flaw exists in how the application processes user input within its NoSQL database queries, creating an avenue for privilege escalation when exploited by authenticated users. This vulnerability directly impacts the integrity and confidentiality of network management operations, potentially allowing attackers to gain elevated privileges beyond their initial authenticated access level.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the UniFi Network Application's database interaction layer. When authenticated users submit requests to the system, the application fails to adequately sanitize user-supplied parameters before incorporating them into NoSQL queries. This lack of proper input filtering creates an environment where maliciously crafted input can manipulate the database query structure, allowing attackers to bypass authentication mechanisms or escalate their privileges to administrative levels. The vulnerability specifically manifests in areas where the application handles user session management, role assignments, and permission checks through NoSQL database operations. According to CWE-94, this represents a Code Injection weakness where the application directly incorporates user-controllable data into NoSQL query execution contexts without proper sanitization, enabling attackers to manipulate the intended behavior of the database queries.
The operational impact of CVE-2026-22558 extends beyond simple privilege escalation to encompass potential full network compromise and persistent access. An attacker who successfully exploits this vulnerability can gain administrative privileges within the UniFi management interface, which typically provides access to all connected network devices and their configurations. This elevated access level allows for comprehensive network reconnaissance, configuration modification, and potential lateral movement within the network infrastructure. The vulnerability's authenticated nature means that an attacker must first obtain valid credentials, but once achieved, the privilege escalation capability can lead to complete network takeover. The attack vector aligns with ATT&CK technique T1078.004 which describes valid accounts as a means for privilege escalation, while also demonstrating the importance of principle of least privilege enforcement. Organizations using UniFi systems face significant risk as this vulnerability can enable attackers to manipulate wireless network settings, access sensitive network data, and potentially establish persistent backdoors within their infrastructure.
Mitigation strategies for CVE-2026-22558 should prioritize immediate patching of affected UniFi Network Application versions, as this represents the most effective defense against exploitation. Organizations should implement network segmentation to limit access to UniFi management interfaces, ensuring that only authorized personnel can reach these critical management systems. Enhanced monitoring of authentication and authorization activities within the UniFi platform can help detect anomalous privilege escalation attempts. Security teams should also enforce strict access controls and implement multi-factor authentication for all administrative accounts. The vulnerability highlights the importance of input validation and parameterized queries in database interactions, aligning with industry best practices for preventing injection attacks. Organizations should conduct thorough security assessments of their UniFi deployments and implement network access controls to limit exposure. Additionally, regular security updates and vulnerability management processes should be strengthened to ensure timely remediation of similar issues. The incident underscores the necessity of maintaining up-to-date security practices and the critical role of proper input sanitization in preventing code injection vulnerabilities within database-driven applications.